[CAUT] New Renner underlever system

[Jim Busby]

Thanks Ken, John,

No, no complaints. But between "parallel" and "rest position" is about 3-5 grams difference. I guess you're right about consistency being most important.

Thanks,
Jim

________________________________
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Ken Zahringer
Sent: Tuesday, May 06, 2008 9:45 AM
To: College and University Technicians
Subject: Re: [CAUT] New Renner underlever system

Hey, Jim,

It is my understanding that the spring tension should be measured with the lever horizontal (parallel to the keybed) and the post tilted back.  At least, that's the way I've always done it.  I think that, in this instance, consistency and precision are more important than the exact measurement you use.  Have you had any complaints?

Regards,
Ken Z.


On 5/6/08 9:27 AM, "Jim Busby" <jim_busby at byu.edu> wrote:
List,

When you adjust the springs (for grams) in the Renner underlever system how/where do you take the measurement? I've installed about a dozen of these and realized maybe I haven't been doing it correctly. Here's the dilemma;

Of course the spring increases resistance as you go upwards. When you measure the # 1 lever as it's parallel to the keybed the grams read 30. Lower it slightly below (10 degrees?) parallel and it reads 26. Raise it slightly above level and it's 33. Renner asks for 29 low - 32 high. Is there a "best" way to do this or have I been OK to just do them all at the same place, i.e. parallel, or level to the keybed?

Thanks,
Jim Busby BYU

--
Ken Zahringer, RPT
University of Missouri
School of Music
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